Gottlieb located the 10 point bell and 100 point (gong) bell and the replay knocker in Mibs on the right hand side of the lower cabinet, most likely because the animated unit in the head took up a lot of space and there were no room for either bell. I'm not sure what other wedgeheads have this design. I know Big Hit has a 100 point bell located in the lower cabinet on the left hand side of the game just pass the tilt bob assembly, along with the triple bar chime unit on the left side of the lower cabinet.

I think Rack a Ball which is the same playfield and game design as Mibs doesn't have a 100 point bell? I viewed a picture on IPDB and the 10 point bell is located in the lower cabinet all the way in the back of the lower left corner of the game, along with the replay knocker.

There isn't a picture on IPDB of a Bowling Queens lower cabinet ,so i'm not sure about the 10 point bell location or the 100 point bell on this game, which also has the same playfield layout as Mibs. Maybe Bowling Queen doesn't have a 100 point bell?

When Mibs scores 500 points (five whacks on the gong bell) for any of the 12 rollovers being scored and or a replay for balls scored, along with high score for replays at the same time, the player for really gets an ear full of how noticeably loud those late 1960's wedgeheads really sounded back then compared to other 1960 wedgeheads.

Check it out
https://ipdb.org/showpic.pl?id=1589&picno=35606